A comparison of different methods for the first-in-pediatric dose selection

Area of Science:

• Pharmacology
• Clinical Pharmacology
• Pediatric Drug Development

Background:

• Optimizing pediatric drug dosage is crucial for ethical and safety reasons in clinical trials.
• Children's unique physiology necessitates accurate dose prediction to avoid repeated dosing for pharmacokinetic, safety, and efficacy evaluations.

Purpose of the Study:

• To evaluate simple methods for predicting the initial dose of drugs in pediatric clinical trials.
• To compare the accuracy of these methods against established clinical practice and physiologically based pharmacokinetic (PBPK) models.

Main Methods:

• Weight-based pediatric dose prediction using allometric scaling.
• Application of the Salisbury rule (a weight-based method).
• Pediatric dose prediction based on estimated drug clearance, compared with PBPK modeling.

Main Results:

• Over 70% of drug dose projections achieved a prediction error of ≤30%.
• The predictive performance of simple methods was comparable to whole-body PBPK models.
• Evaluated 27 drugs across various pediatric age groups, from neonates to adolescents.

Conclusions:

• Simple, spreadsheet-developable methods offer accurate and rapid pediatric dose projection.
• The Salisbury rule is particularly effective for children over 30 kg, suitable for clinical settings.